<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <script>
        const obj={
            name:'gch',
            hobbies:['篮球','音乐'],
        }
        Obj.freeze(obj);//浅层 对象里面不可改变
        obj.name='123';
        obj.sex='男';
        obj.hobbies.unshift('羽毛球');
        console.log(obj);
    </script>
</body>
</html>